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On recoated powder quality with a forward rotating flexible roller in laser powder bed fusion of 30 wt% 5 mu m SiCp/AlSi10Mg composites
Tang, Min1,2,4; Guo, Yaoqi1,2; Zhang, Weihao1,2; Ma, Honglin1,3; Yang, Liang1,3; Wei, Wenhou1,3; Wang, Linzhi1,3; Fan, Shuqian1,3; Zhang, Qi1,3
2023
摘要This paper proposes a new powder recoating mechanism named forward rotating flexible roller (FRFR) which aims to solve the poor powder flowability problem brought by the aggregation effect of the fine particles in the mixed 30 wt% 5 mu m SiC and 55 mu m AlSi10Mg powder. An initial extrusion force instead of a gap between the flexible roller and powders is used to improve the recoated powder density, while the recoated powder layer thickness is proved to be controllable. An industrial camera and a laser displacement sensor were used to estimate the recoated surface filling rate and recoated surface profile. The mixed powder was recoated with an FRFR on a baseplate at first, the achieved surface filling rate was the same as that of 55 mu m AlSi10Mg recoated with a rubber blade. Then 120 layers of mixed powder were recoated continuously with FRFR, the recoated surface profile within a single layer and between multiple layers were compared with the rubber blade recoated AlSi10Mg, their difference is insignificant. Furthermore, composite parts with different shapes were successfully made with the FRFR. This technique is proved to be promisihfcang for laser powder bed fusion of fine particle ceramic and metal mixed powder. (C) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
关键词Forward rotating flexible roller 30 wt% 5 mu m SiCp/AlSi10Mg Recoating pressure Recoated surface filling rate Recoated surface profile Powder layer thickness
DOI10.1016/j.matdes.2022.111489
发表期刊MATERIALS & DESIGN
ISSN0264-1275
卷号225页码:12
通讯作者Zhang, Qi(zhangqi@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000992822300001
语种英语